EP1499551A1 - Vorrichtung und verfahren zum erfassen eines bahnbruchs an einer eine bahn verarbeitenden maschine - Google Patents
Vorrichtung und verfahren zum erfassen eines bahnbruchs an einer eine bahn verarbeitenden maschineInfo
- Publication number
- EP1499551A1 EP1499551A1 EP03706296A EP03706296A EP1499551A1 EP 1499551 A1 EP1499551 A1 EP 1499551A1 EP 03706296 A EP03706296 A EP 03706296A EP 03706296 A EP03706296 A EP 03706296A EP 1499551 A1 EP1499551 A1 EP 1499551A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- web
- sensor
- sensors
- detecting
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
- B65H26/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs
- B65H26/025—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs responsive to web breakage
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8901—Optical details; Scanning details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/10—Speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2553/00—Sensing or detecting means
- B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
- B65H2553/41—Photoelectric detectors
- B65H2553/414—Photoelectric detectors involving receptor receiving light reflected by a reflecting surface and emitted by a separate emitter
Definitions
- the invention relates to an apparatus and a method for detecting a web break on a machine processing a web according to the preamble of claim 1, 8, 9 or 11.
- changing the web can also be the cause of voltage fluctuations that could be erroneously recorded as a web break.
- DE 42 19 645 A1 proposes a device for detecting a paper web tear, which reacts to a reversal of the direction of the paper web.
- a reversal of direction can occur if, as a result of a web break, the web tension has decreased to such an extent that a largely tension-free section of the web is able to adhere to a roller of the machine and wind up on it.
- web material that has already passed the roll in question can be withdrawn and wound onto the roll.
- the winder on the roller has already started to form. If the formation of the winder does not begin immediately when the web breaks, a large-scale plugger may have formed elsewhere on the machine before the device responds.
- a device for detecting a web break as a function of the speed of the web is known from DE 101 29 889 A1.
- the invention has for its object to provide a device and a method for detecting a web break on a machine processing a web.
- the advantages which can be achieved with the invention consist in particular in that simple means enable an exact speed measurement of the web and thus early detection of a web break.
- the measured variable is proportional to the ratio of Path speed to the movement speed of the periodic pattern.
- Another advantage is that the measured variable does not disappear even when the web is at rest, so that the invention makes it possible to distinguish between a stationary and a non-existing web.
- the device can work largely autonomously even with changing web speeds if the evaluation device is set up, the setpoint with which it unites compares the current measured speed value of the sensor with previous measured values supplied by the speed sensor. This can be done by means of a floating middle path, whereby the time constant of the mean value should be chosen short enough so that changes in the speed of the web that result from desired control processes, for example when the web processing machine starts up, do not trigger the sensor.
- the evaluation device derives the setpoint value with which it compares the current measured value of a given speed sensor from a measured value or measured values that are / are supplied by at least one other speed sensor, e.g. B. from virtual master axis.
- the device can be equipped with an input for applying a signal representative of the desired value.
- a signal can e.g. B. are supplied by the web processing machine, e.g. B. virtual or real master axis speed, but it can also be supplied by a second speed sensor.
- Figure 1 is a schematic representation of a printing press which is equipped with a device for detecting a web break.
- Fig. 2 is a schematic representation of the speed sensor of the device.
- the printing machine shown in Fig. 1 comprises a reel changer 01, of which a web 02 to be printed and monitored, e.g. B. a paper web 02 is unwound, two printing units 03; 04, a drying device 06, a cooling roll arrangement 07, a folding former 08 and a folder 09, which are passed through in sequence by the web 02.
- a reel changer 01 of which a web 02 to be printed and monitored, e.g. B. a paper web 02 is unwound, two printing units 03; 04, a drying device 06, a cooling roll arrangement 07, a folding former 08 and a folder 09, which are passed through in sequence by the web 02.
- Pull roller pairs 11 are arranged at different points on the path of the web 02 and are controlled in order to maintain a desired tension of the web 02 evenly.
- Various protective devices 12; 13 in the event of a web break are arranged along the path of the web 02.
- a first of these protective devices 12 is a knife 12, which is arranged at the entrance of the first printing unit 03, in order to cut the web 02 immediately if a web break is detected within the printing press and thus the replenishment of web material that leads to winders and tampers in the Printing machine could prevent as soon as possible.
- a catching device 13 is arranged at the entrance of the drying device 06, which is used in the event of a web break, the from the printing units 03; 04 diverted web 02 and catch before it can reach the drying facility 06.
- the catching device 13 avoids retractors in the printing units 03; 04th
- the protective devices 12; 13 are controlled by an evaluation device 14. This is connected to a plurality of sensors 16 arranged at different points along the path of the web 02 for detecting the web speed. 1, sensors 16 are located at the output of each printing unit 03; 04 in front of and behind the drying device 06, behind the cooling roller arrangement 07, before the entry of the web 02 arranged in the former 08, and between the former 08 and the folder 09.
- the evaluation device 14 also has an input 17, via which it receives a setpoint value for the web speed from a (not shown) control of the printing press.
- the evaluation device 14 supplies a web breakage detection signal which activates the protective devices 12, 13 and triggers an emergency stop of the printing press as soon as it detects a deviation of one of the measured values supplied by the sensors 16 from the target value, which exceeds a predetermined percentage of the target value.
- the input 17 is omitted; instead, the speed setpoint with which the measured value of an individual sensor 16 is compared in the evaluation device 14 is derived from measured values of other sensors 16. This can e.g. B. done in a simple manner by averaging over the speed measured values detected by the other sensors 16.
- the evaluation device 14 calculates the speed setpoint with which it compares the speed detected by the sensor 16 at a given point in time as a moving average of speed values previously detected by the same sensor 16.
- the evaluation device 14 carries out at least two of the comparisons described above for the different variants in parallel. So z. B. if, after a web break, the speeds detected by various sensors 16 drift up and down from the setpoint, comparing these speeds with one another detects the web break even earlier than by comparing the speeds individually with the setpoint.
- FIG. 2 schematically shows the structure of a sensor 16 preferred in the context of the present invention, e.g. B.
- a speed sensor 16 comprises a projection device for projecting a moving line pattern onto the web 02 and a light detector for detecting light reflected by the light pattern.
- the projection device is constructed from a frequency-stabilized laser diode 21, in particular a semiconductor laser diode, which emits a laser beam into an acousto-optical modulator or a Bragg cell 22. Part of the laser beam passes through the Bragg cell 22 unchanged; another part is at a resonance vibration excited in the Bragg cell 22 with a frequency of z. B. 40 MHz and frequency shifted by the resonance frequency.
- the two beams obtained in this way are guided, over mirrors 23, to overlap on the surface of the web 02.
- the light reflected from the surface of the web 02 is directed onto a photodetector 26 via a lens 24. This provides an electrical output signal, the amplitude of which corresponds to the received light intensity.
- the output signal of the photodetector 26 contains an oscillating component, the frequency of which depends on the speed of the web 02.
- a frequency measuring circuit for detecting this frequency and providing an output signal proportional to it can be part of the sensor 16, but it can also be be realized within the evaluation device 14.
- the senor 16 can optionally be assigned to different tracks 02.
Landscapes
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Textile Engineering (AREA)
- Immunology (AREA)
- Engineering & Computer Science (AREA)
- Pathology (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Treatment Of Fiber Materials (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Machine Tool Sensing Apparatuses (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10219541A DE10219541C1 (de) | 2002-05-02 | 2002-05-02 | Vorrichtung zum Erfassen eines Bahnbruckes an einer eine Bahn verarbeitenden Maschine |
| DE10219541 | 2002-05-02 | ||
| PCT/DE2003/000347 WO2003095348A1 (de) | 2002-05-02 | 2003-02-07 | Vorrichtung und verfahren zum erfassen eines bahnbruchs an einer eine bahn verarbeitenden maschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1499551A1 true EP1499551A1 (de) | 2005-01-26 |
| EP1499551B1 EP1499551B1 (de) | 2006-06-21 |
Family
ID=29413691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03706296A Expired - Lifetime EP1499551B1 (de) | 2002-05-02 | 2003-02-07 | Vorrichtung und verfahren zum erfassen eines bahnbruchs an einer eine bahn verarbeitenden maschine |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1499551B1 (de) |
| AT (1) | ATE330892T1 (de) |
| AU (1) | AU2003208283A1 (de) |
| DE (2) | DE10219541C1 (de) |
| WO (1) | WO2003095348A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9381519B2 (en) | 2006-03-31 | 2016-07-05 | Roche Molecular Systems, Inc. | Apparatus for separating magnetic particles from liquids containing said particles, and an array of vessels suitable for use with such an apparatus |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005097645A1 (de) * | 2004-04-05 | 2005-10-20 | Koenig & Bauer Aktiengesellschaft | Verfahren und vorrichtungen zum kappen und/oder züführen eines stranges in eine weiterverarbeitungsstufe |
| CN100376390C (zh) * | 2006-03-16 | 2008-03-26 | 上海高斯印刷设备有限公司 | 智能化光电断纸探测方法和装置 |
| DE102007039373C5 (de) * | 2007-08-21 | 2018-10-25 | Koenig & Bauer Ag | Verfahren zur Überwachung des Stranglaufes in einem Trichteraufbau einer Rotationsdruckmaschine |
| DE102011082005B4 (de) * | 2011-09-01 | 2015-01-29 | Koenig & Bauer Aktiengesellschaft | Verfahren zum Steuern eines Transports von Druckerzeugnissen von einer Auslage eines Falzapparates einer Druckmaschine nach einer dem Falzapparat nachgeordneten Fördereinrichtung eines Systems zur Weiterverarbeitung der Druckerzeugnisse |
| EP3699356A1 (de) * | 2019-02-25 | 2020-08-26 | Siemens Aktiengesellschaft | Verfahren und vorrichtung zur erkennung eines bahnabrisses einer faserbahn, industrielle anlage sowie computerprogrammprodukt |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3070365A (en) * | 1958-03-13 | 1962-12-25 | Jagenberg Werke Ag | Method of and means for detecting flaws and the like in a plurality of superposed webs or sheets |
| CH464633A (de) * | 1965-03-18 | 1968-10-31 | Siemens Ag | Verfahren zum registergerecht synchronen Anschluss einer sich drehenden Rolle an eine bewegte Warenbahn, Einrichtung zur Durchführung des Verfahrens und Anwendung desselben |
| US4186309A (en) * | 1977-10-13 | 1980-01-29 | Web Printing Controls Co. Inc., | Web monitoring and control apparatus for web handling machinery |
| CA1222319A (en) * | 1985-05-16 | 1987-05-26 | Cip Inc. | Apparatus for analysing the formation of a paper web |
| DE3822497A1 (de) * | 1987-12-02 | 1989-10-19 | Kotterer Grafotec | Vorrichtung zum verhindern von maschinenschaeden |
| FI88828C (fi) * | 1991-02-06 | 1993-07-12 | Valmet Paper Machinery Inc | Foerfarande och anordning vid fotoelektrisk identifiering av en materialbana |
| DE4106901C2 (de) * | 1991-03-05 | 1994-05-26 | Kotterer Grafotec | Verfahren und Vorrichtung zur Überwachung einer Bahn |
| DE4130679C2 (de) * | 1991-09-14 | 1994-02-24 | Roland Man Druckmasch | Vorrichtung zum Verhindern von Druckwerkschäden |
| DE4219645C2 (de) * | 1992-06-16 | 1996-01-18 | Weitmann & Konrad Fa | Vorrichtung zur Erkennung eines Bahnrisses in einer Rollendruckmaschine |
| DE9320409U1 (de) * | 1993-04-26 | 1994-06-23 | Albert-Frankenthal Ag, 67227 Frankenthal | Einrichtung zum Verhindern von Druckwerksschäden bei Bahnriß |
| DE19506463C2 (de) * | 1995-02-24 | 1998-11-12 | Boewe Systec Ag | Stauüberwachungseinrichtung für eine Transportvorrichtung für Papier, insbesondere für eine Papierbahn |
| FR2734513B1 (fr) * | 1995-05-22 | 1997-08-14 | Heidelberg Harris Sa | Procede de detection de perturbations dans le transport d'une nappe continue de papier dans une machine a imprimer |
| DE19827190A1 (de) * | 1998-06-18 | 1999-12-23 | Koenig & Bauer Ag | Verfahren und Vorrichtung zur Überwachung einer Materialbahn |
| DE20004803U1 (de) * | 2000-03-16 | 2000-05-25 | "MTE" Messgeräte, Entwicklungs- und Vertriebsgesellschaft m.b.H., Wien | Vorrichtung zur Detektion von Flachgutkanten |
| DE10129889A1 (de) * | 2000-07-14 | 2002-01-24 | Heidelberger Druckmasch Ag | Verfahren und Vorrichtung zur Störungserfassung beim Transport einer Bahn |
-
2002
- 2002-05-02 DE DE10219541A patent/DE10219541C1/de not_active Expired - Fee Related
-
2003
- 2003-02-07 EP EP03706296A patent/EP1499551B1/de not_active Expired - Lifetime
- 2003-02-07 AT AT03706296T patent/ATE330892T1/de not_active IP Right Cessation
- 2003-02-07 WO PCT/DE2003/000347 patent/WO2003095348A1/de not_active Ceased
- 2003-02-07 AU AU2003208283A patent/AU2003208283A1/en not_active Abandoned
- 2003-02-07 DE DE50303954T patent/DE50303954D1/de not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03095348A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9381519B2 (en) | 2006-03-31 | 2016-07-05 | Roche Molecular Systems, Inc. | Apparatus for separating magnetic particles from liquids containing said particles, and an array of vessels suitable for use with such an apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| DE50303954D1 (de) | 2006-08-03 |
| AU2003208283A1 (en) | 2003-11-11 |
| ATE330892T1 (de) | 2006-07-15 |
| EP1499551B1 (de) | 2006-06-21 |
| DE10219541C1 (de) | 2003-12-11 |
| WO2003095348A1 (de) | 2003-11-20 |
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